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Special and General Relativity Forum

Join in expert discussion on special and general relativity discussion. Relativity is the dependence of various physical phenomena on relative motion of the observer and the observed objects.

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Graduate Do Hotdogs Shrink When Traveling Near Light Speed?

syano
Oct 12, 2003 · Replies 17 · Oct 14, 2003

Replies: 17

Graduate What is the relationship between gravity and time?

scott_sieger
Oct 12, 2003 · Replies 1 · Oct 14, 2003

Replies: 1

Graduate Is Time the 4th Dimension in Physics?

toppam
Jul 4, 2003 · Replies 43 · Oct 14, 2003

2

Replies: 43

Undergrad Explanation of special and general relativity

benzun_1999
Oct 13, 2003 · Replies 3 · Oct 13, 2003

Replies: 3

Graduate Do Time Paradoxes Prove the Impossibility of Time Travel?

MathematicalPhysicist
Oct 8, 2003 · Replies 11 · Oct 11, 2003

Replies: 11

Graduate How General R disobeys the (Special R) speed limit

marcus
Sep 18, 2003 · Replies 18 · Oct 9, 2003

Replies: 18

Graduate The transference of potential energy to kenetic energy and it's effect on momentum

carl fischbach
Oct 8, 2003 · Replies 2 · Oct 8, 2003

Replies: 2

High School The sun attractive to the earth and holds us in orbit.

wolram
Oct 5, 2003 · Replies 4 · Oct 6, 2003

Replies: 4

Graduate Loop quantum cosmology replacing the Big Bang singularity

marcus
Sep 19, 2003 · Replies 12 · Oct 5, 2003

Replies: 12

Graduate Does gravity warp matter as well as spacetime?

Rockazella
Sep 26, 2003 · Replies 13 · Oct 5, 2003

Replies: 13

Graduate New test of GR - verified to 1:20,000

Nereid
Oct 3, 2003 · Replies 6 · Oct 4, 2003

Replies: 6

Graduate Lambda interacts with gravity to give expantion

wolram
Oct 2, 2003 · Replies 5 · Oct 3, 2003

Replies: 5

High School What does the Slice of Pie album cover show about relativity?

MathematicalPhysicist
Sep 30, 2003 · Replies 3 · Oct 2, 2003

Replies: 3

Graduate How can gravity from a black hole affect nearby objects if light cannot escape?

Clausius2
Sep 23, 2003 · Replies 22 · Sep 30, 2003

Replies: 22

Graduate Using gravity to explain gravity

hypnagogue
Sep 12, 2003 · Replies 30 · Sep 29, 2003

2

Replies: 30

Graduate Was Einstein's Original Formula for Transverse Mass Incorrect?

pmb
Sep 8, 2003 · Replies 35 · Sep 22, 2003

2

Replies: 35

Graduate New Bojowald paper-BB non-singularity continued

marcus
Sep 18, 2003 · Replies 3 · Sep 18, 2003

Replies: 3

Graduate Planck units in his quantum foam theory

wolram
Sep 17, 2003 · Replies 3 · Sep 18, 2003

Replies: 3

Graduate Let's see how the new board works GR-wise

marcus
Sep 17, 2003 · Replies 5 · Sep 17, 2003

Replies: 5

Graduate Is Dark Energy Really Just Negative Pressure?

newton1
Sep 17, 2003 · Replies 3 · Sep 17, 2003

Replies: 3

Graduate How does spacetime radiate gravitational waves?

wolram
Sep 14, 2003 · Replies 15 · Sep 17, 2003

Replies: 15

Graduate How Does Relativity Affect the Perception of a Falling Body Near a Massive Star?

garys_2k
Sep 3, 2003 · Replies 2 · Sep 11, 2003

Replies: 2

Graduate Two equally accelerated planets and time dilation symmetry

jrlogan1
Sep 8, 2003 · Replies 10 · Sep 10, 2003

Replies: 10

Graduate Can Gravity Deviate from 1/r² at Short Distances?

Doctor Luz
Sep 9, 2003 · Replies 4 · Sep 10, 2003

Replies: 4

Graduate Does Time Actually Slow Down During High-Speed Travel?

aiglet_2000
Aug 13, 2003 · Replies 13 · Sep 8, 2003

Replies: 13

High School Does gravity from multiple nearby objects add up into gravitational waves?

Isotope
Sep 5, 2003 · Replies 3 · Sep 7, 2003

Replies: 3

Graduate Understanding Cd^2 and Its Relationship to SR in Practice

ddr
Sep 3, 2003 · Replies 2 · Sep 5, 2003

Replies: 2

Graduate Two inertial systems with 2:1 clock rate ratio: what can be deduced?

wimms
Aug 20, 2003 · Replies 30 · Sep 3, 2003

2

Replies: 30

Graduate Whose clock runs slower between two moving galaxies

nucleartear
Aug 24, 2003 · Replies 38 · Sep 3, 2003

2

Replies: 38

Graduate How does energy differ from mass?

fractal
Jul 21, 2003 · Replies 48 · Aug 22, 2003

2

Replies: 48

Graduate Is time just another dimension or something more?

HBar
Jul 27, 2003 · Replies 21 · Aug 20, 2003

Replies: 21

Graduate Absolute Space and Time in Einstein's General Theory of Relativity

Eugene Shubert
Aug 18, 2003 · Replies 8 · Aug 20, 2003

Replies: 8

Graduate Does Travelling at Light Speed Turn the Time Cone into a Cube?

kokain
Aug 19, 2003 · Replies 1 · Aug 19, 2003

Replies: 1

Graduate Gravity and Time: A Revolutionary Thought

cytokinesis
Aug 17, 2003 · Replies 5 · Aug 19, 2003

Replies: 5

Undergrad Questioning the Inclusion of Time in the E=mc2 Equation

my80chevette
Aug 18, 2003 · Replies 4 · Aug 19, 2003

Replies: 4

Graduate Is Peter Lynds a Controversial Figure in the Discussion of Space and Time?

Michael Artime
Aug 13, 2003 · Replies 1 · Aug 15, 2003

Replies: 1

Graduate Do tachyons speed up when you accelerate toward their source?

Tyger
Aug 7, 2003 · Replies 15 · Aug 14, 2003

Replies: 15

Graduate Is symmetry the key to understanding our relativistic universe?

wuliheron
Aug 12, 2003 · Replies 4 · Aug 14, 2003

Replies: 4

Undergrad How Is Age Calculated in the Twin Paradox?

MathematicalPhysicist
Aug 12, 2003 · Replies 3 · Aug 13, 2003

Replies: 3

Graduate The Implications of Homogeneity and Isotropy

Eugene Shubert
Aug 6, 2003 · Replies 5 · Aug 6, 2003

Replies: 5

Graduate Why does relativistic Doppler shift occur if light speed is constant?

MisterBig
Jul 31, 2003 · Replies 19 · Aug 5, 2003

Replies: 19

Graduate Is the Twin Paradox Really Solved by Considering Acceleration?

khashayar
Aug 4, 2003 · Replies 7 · Aug 5, 2003

Replies: 7

Graduate Can the Effects of Relativity be Detected in a Simple Wire Experiment?

Rockazella
Aug 4, 2003 · Replies 10 · Aug 4, 2003

Replies: 10

Undergrad Why doesn't the spaceship observer see the stationary clock as slow too?

Rockazella
Aug 2, 2003 · Replies 17 · Aug 4, 2003

Replies: 17

Graduate Are the people encountered in time travel the same as in the present?

MathematicalPhysicist
Jul 14, 2003 · Replies 4 · Aug 1, 2003

Replies: 4

Graduate Is Time Truly Relative or Does It Happen Simultaneously?

Chen
Jul 28, 2003 · Replies 14 · Jul 30, 2003

Replies: 14

Undergrad Why do moving clocks slow down relative to each other in Einstein's theory?

zoobyshoe
Jul 26, 2003 · Replies 2 · Jul 28, 2003

Replies: 2

Graduate Did Einstein Believe in the Aether? Deciphering the Controversial Claims

selfAdjoint
Jul 18, 2003 · Replies 40 · Jul 24, 2003

2

Replies: 40

Graduate Can multidimensional time exist in physics?

goldeng8
Jul 22, 2003 · Replies 4 · Jul 22, 2003

Replies: 4

Graduate What is the Paradox of Gravitation and its Resolution?

Tyger
May 24, 2003 · Replies 59 · Jul 19, 2003

2

Replies: 59

Graduate What is imaginary time in physics?

maximus
Jun 9, 2003 · Replies 22 · Jul 19, 2003

Replies: 22

Graduate Clock rate disagreement in transverse Doppler effect experiments

Thomas
Jul 5, 2003 · Replies 21 · Jul 11, 2003

Replies: 21

Graduate What is the Significance of the Imaginary Part in Relativistic Distance?

Imagine
Jul 1, 2003 · Replies 21 · Jul 8, 2003

Replies: 21

Graduate Paul Marmet's claims about flatness, contraction and time dilation

wolram
Jul 7, 2003 · Replies 1 · Jul 7, 2003

Replies: 1

High School Has time dilation ever been proven experimentally?

einsteinian77
Jul 1, 2003 · Replies 11 · Jul 4, 2003

Replies: 11

Graduate Time as the fourth dimension and radius of space

toppam
Jul 4, 2003 · Replies 1 · Jul 4, 2003

Replies: 1

Undergrad Can a 100m sprint be completed in less than light-speed time?

brum
Jun 30, 2003 · Replies 16 · Jul 2, 2003

Replies: 16

High School What Is the Twin Paradox?

Tail
Jun 30, 2003 · Replies 16 · Jul 2, 2003

Replies: 16

Undergrad How do the effects of relativity cancel out in the twin paradox?

CaptainN
Jun 30, 2003 · Replies 6 · Jun 30, 2003

Replies: 6

Graduate String irrelevant to quantizing General Relativity (quantum spacetime geometry)

marcus
Jun 27, 2003 · Replies 4 · Jun 29, 2003

Replies: 4

Undergrad Does infinite speed of gravity in Newton's theory imply infinite distance or time?

MathematicalPhysicist
Jun 28, 2003 · Replies 1 · Jun 28, 2003

Replies: 1

Graduate Sagnac effect and Einstein's postulate of constant light velocity

Bossieman
Jun 24, 2003 · Replies 1 · Jun 24, 2003

Replies: 1

Graduate What are the fundamental concepts of relativity explained by Einstein?

Meninger
Jun 15, 2003 · Replies 9 · Jun 21, 2003

Replies: 9

Graduate How Does Time Dilation Affect Perception of Events?

O Great One
Jun 9, 2003 · Replies 18 · Jun 20, 2003

Replies: 18

Graduate What is doubly special relativity and where does Planck's length come from?

sen_almighty
Jun 11, 2003 · Replies 2 · Jun 18, 2003

Replies: 2

Undergrad Does Relativistic Mass Increase with Speed?

ando
Jun 3, 2003 · Replies 32 · Jun 14, 2003

2

Replies: 32

Graduate Is Time Vacuum Energy According to Einstein's Biggest Blunder?

Tesla
Apr 29, 2003 · Replies 15 · Jun 10, 2003

Replies: 15

Undergrad Are phottons effected by gravity?

anil
Jun 9, 2003 · Replies 5 · Jun 10, 2003

Replies: 5

Graduate Book covering special and general relativity from postulates to formulas

layman
Jun 6, 2003 · Replies 3 · Jun 7, 2003

Replies: 3

Graduate Understanding of the theory of relativity

maximus
May 28, 2003 · Replies 11 · Jun 6, 2003

Replies: 11

Graduate Making a wormhole just got easier

Ivan Seeking
Jun 3, 2003 · Replies 10 · Jun 5, 2003

Replies: 10

Graduate Is Time Travel Possible According to Physics?

eastsidecrew
May 31, 2003 · Replies 3 · Jun 1, 2003

Replies: 3

Graduate How does gravity operate at the quantum level?

RuroumiKenshin
May 28, 2003 · Replies 14 · May 31, 2003

Replies: 14

Graduate How Can Understanding Time and Relativity Change Our Perception of Reality?

meteor
May 25, 2003 · Replies 29 · May 29, 2003

Replies: 29

Graduate Is the Curvature of Spacetime the Cause of Singularities in Black Holes?

damgo
Mar 17, 2003 · Replies 22 · May 28, 2003

Replies: 22

Graduate Complete predictability contradicts relativity I think

bogdan
Apr 28, 2003 · Replies 18 · May 28, 2003

Replies: 18

Graduate Absolute time order in Einstein's closed universe

Eugene Shubert
May 23, 2003 · Replies 17 · May 28, 2003

Replies: 17

Graduate Can Magnitism Stretch Time and Allow for Faster-Than-Light Travel?

RuroumiKenshin
May 23, 2003 · Replies 4 · May 24, 2003

Replies: 4

Undergrad If you slow down from near light speed, would you jump forward in time?

monkeysk8er
May 23, 2003 · Replies 7 · May 24, 2003

Replies: 7

Graduate Relativity of unit of measurement

heusdens
May 16, 2003 · Replies 20 · May 22, 2003

Replies: 20

Graduate Does SR seem like a total mystery to you?

quantumdude
Mar 7, 2003 · Replies 17 · May 22, 2003

Replies: 17

Graduate Why Do We Need Covariant and Contravariant Concepts in Relativity Theory?

Symmetry
May 8, 2003 · Replies 15 · May 20, 2003

Replies: 15

Graduate Surface gravity calculation for the sun using Newton's equation

Astronomer107
May 17, 2003 · Replies 7 · May 18, 2003

Replies: 7

Graduate Total energy vs free particle energy in special relativity

pmb
May 13, 2003 · Replies 10 · May 17, 2003

Replies: 10

Graduate What Happens to the Universe's Energy When Time Travel Leaves an Object Behind?

Moogle
Apr 23, 2003 · Replies 24 · May 6, 2003

Replies: 24

Graduate Is Time the Fourth Dimension?

toppam
Apr 25, 2003 · Replies 10 · May 6, 2003

Replies: 10

Graduate Yes, I can see the ‘Straight’ line, but is it really straight?

Mr. Robin Parsons
May 1, 2003 · Replies 17 · May 6, 2003

Replies: 17

Graduate Warp drives and the Morris-Thorne space tunnel as faster-than-light travel

Whitestar
Apr 23, 2003 · Replies 10 · May 4, 2003

Replies: 10

Graduate I had bazzar thought on relativity

chosenone
Apr 29, 2003 · Replies 12 · May 2, 2003

Replies: 12

Graduate What Is the Difference Between Invariant Mass and Proper Mass?

pmb
Apr 29, 2003 · Replies 11 · Apr 30, 2003

Replies: 11

Graduate Einstein's General and Special Theory of Relativity

Radiatedtheory18
Apr 30, 2003 · Replies 2 · Apr 30, 2003

Replies: 2

Undergrad How does time dilation work?

Koveras00
Apr 15, 2003 · Replies 52 · Apr 29, 2003

2

Replies: 52

Graduate Hey, how predictable is a frame of reference going faster than c?

KillaMarcilla
Apr 29, 2003 · Replies 2 · Apr 29, 2003

Replies: 2

High School Gravitational Attraction: How Matter Interacts Without Repelling

rspandher
Apr 21, 2003 · Replies 8 · Apr 23, 2003

Replies: 8

Graduate The Twins Paradox and the Experience of Time

Les Sleeth
Apr 12, 2003 · Replies 90 · Apr 23, 2003

4

Replies: 90

Graduate How To Teach Special Relativity

Eugene Shubert
Mar 20, 2003 · Replies 2 · Apr 21, 2003

Replies: 2

Undergrad Can you convert kinetic energy to mass using E=mc²?

RuroumiKenshin
Apr 18, 2003 · Replies 12 · Apr 21, 2003

Replies: 12

Graduate What are 'rods' and 'clocks in relativity?

Sul
Apr 11, 2003 · Replies 8 · Apr 20, 2003

Replies: 8

Graduate Travel Near C: Electron Behavior and Lorentz Contraction

MrCaN
Apr 18, 2003 · Replies 6 · Apr 18, 2003

Replies: 6

Graduate Relative velocities in relativity

tfast
Apr 18, 2003 · Replies 3 · Apr 18, 2003

Replies: 3

sidebar

Relativity

The theory of relativity, formulated by Albert Einstein, comprises two fundamental theories—special and general relativity. Special relativity, proposed in 1905, redefines our understanding of space and time by asserting the constancy of the speed of light for all observers and introducing concepts like time dilation and length contraction.

General relativity, presented in 1915, extends these principles to incorporate gravity. It describes gravity as the curvature of spacetime caused by massive objects, leading to phenomena like gravitational time dilation and the prediction of black holes. Einstein's equations have been consistently validated through experiments and observations, profoundly influencing our comprehension of the universe's fabric and dynamics.

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